Sixteen subjects were given 8 pre-practice, 80 practice, and 8 post-practice trials with the inverted T illusion figure. Judgements were made haptically with one hand being used on pre- and post-practice trials and the other hand on practice trials. Mean illusion diminished in magnitude over the practice trials. Inter-manual transfer of the practice decrement was found, but it was partial rather than complete. The illusion after practice was less than before practice, but it was greater than the error found on the last block of practice trials. The bearing of these results on the different theories of illusions is considered.
Get full access to this article
View all access options for this article.
References
1.
DayR. H. (1962). The effects of repeated trials and prolonged fixation on error in the Müller-Lyer figure. Psychol. Monogr.76, Whole No. 533.
2.
JuddC. H. (1902). Practice and its effects on the perception of illusions. Psychol. Rev.9, 27–39.
3.
KöhlerW.DinnersteinD. (1947). Figural aftereffects in kinaesthesis. Miscellanae Psychologica Albert MichotteLouvian: Louvain University.
4.
KöhlerW.FishbankJ. (1950). The destruction of the Müller-Lyer illusion in repeated trials. J. exp. Psychol.40, 267–81398–410.
5.
PiagetJ. (1961). Les Mécanismes PerceptifsParis: Presses Universitaires de France.
6.
RévészG. (1953). Lassen sich die bakannten geometrischoptischen Tauschungen auch in haptischen Gebiet nachweisen?. J. Psychol. Psychotherapie1, 464–78.
7.
RudelR. G.TeuberH.-L. (1963). Decrement of visual and haptic Müller-Lyer illusion on repeated trials: A study of crossmodal transfer. Quart. J. exp. Psychol.15, 125–31.
8.
SingerG.DayR. H. (1966). Interlimb and interjoint transfer of a kinesthetic spatial aftereffect. J. exp. Psychol.71, 109–14.
